Disinfectant



atlases Patented July 25, "1933 UN] OFFICE RUDOLF LEHMANN, OF UERDINGEN-ON-TIIE-RHINE, FRANZ HEGKMZANNS AND KARI: DOIBMAIER, OF LEVEBKUSEN-ON-THE-RHINE, AND J'AKOB WILLEHS, F CREFELD, GERMANY, ASSIGNORS TO WINTHROP CHEMICAL COMPANY, INC., 01 NEW YORK, N. Y., A CORPORATIQN' OF NEW YORK DISINFECTANT Ho Drawing. Application filed Kay 13, 1930, Serial No. 452,130, and in Gcnnany Iay 15, 1929.

This invention relates to new disinfectant products.

In accordance with the present invention objects exposed to infection by micro-orga- 6 nisms or already infected thereby are rendered resistant to or free therefrom by treating said objects in either a dry or a wet proccss with an additional compound obtainable by combining an aromatic hydroxy compound 10 as such or in the form of its alkali-metal salts,

such as dichlorophenol, trichlorophenol, trichlorocresol, tetrachlorophenol on with an aliphatic amine or a substitution product thereof such as amino-isopro ylalcohol, mono-, dior trihydroxylthylamme, monopropanolamine, and so on. Substances of this type suitable for the object in View are described in the literature, for example in Chemie in Einzeldarstellun en, Vol. XL, 1922, Organische Molekiilver indungen von Paul Pfeifi'er, page 258 sequ.; they are obtainable by melting or dissolving together one molecular proportion of the phenol compound with one or two molecular proportions of the aliphatic amine. The compounds thus produced are stable colorless crystalline powders, easily soluble in water and organic solvents, such as alcohol, benzine, acetone, pyridine and so on.

These substances, especially in an aqueous solution, are highly efficacious against plant pests and micro-organisms such as bacteria, moulds and the like with the result that they can likewise be employed, for all purposes of preserving or disinfecting, for example the immunizing of grain or the like, the preser; vation of wood, the prevention of mildew formation, in the preservation of starch paste, gelatine, sizing materials, solutions of glue,

arabic, dextrine, cosmetics as well as blood, pus and the like.

According to the specific material to be disinfected these compounds are applied in the various ways, as can be seen from the examples. The quantities of the disinfectants to be added may vary within wide limits. On carrying out our new invention suitable concentrations will be found by those skilled 50 in the art.

The invention is illustrated by the followin examples: I

wample 1.- parts by weight of trichlorophenol and 50 parts by weight of aminoisopropylalcohol are homogenized by melting together. This mixture is miscible with water in any proportion. For instance solutions of from 0.1 to 0.2 per cent strength are suitable for preserving or disinfecting technical products, such as glue, gelatine, siz ing materials, starch paste, wood and the like. These aqueous solutions may also be used as v disinfectants against bacteria and the like.

'Ewample 2.A mixture of 70 parts by weight of trichlorocresol and 30 parts by weight of aminoethyla'lcohol is liquefied by heating and intimately mixed. This mixture is diluted with water'to form a 0.1 to 0.2% solution which represents a highly efficacious agent in the preservation of starch paste.

Example 3.-40 parts by weight of trichlorophenol are dissolved in parts by weight of a mixture from mono-, diand trihydroxyethylamine. This solution is diluted with water to a clear solution as given in Example. 1 and 2 and then can be used for the same purposes as mentioned in these preceding examples.

Ewample 4.-40 parts by weight of caustic soda lye, 197 parts by weight of trichloro phenol, 94.8 parts by weight of water and 142.2 parts by weight of monoethanolamine yield a solution of the additional compound from the sodium salt of trichlorophenol and the amine, in a highly stable form. Thi:. solution may be used as disinfectant, especially in the preservation of starch paste. Ewample 5.163 parts by weight of 2.6- dichlorophenol, 40 parts by weight of sodium D hydroxide, 333 parts by weight of monoproo panolamine and 204 parts by weight of water yield a stable solution, which may be employed for the same purpose as mentioned above.

Emample 6.-232 parts by weight of 2, 3, 4,6-tetrachlorophenol, 40 parts by weight of sodium hydroxide, 150 parts by-weight of monoethanolamine, 75 parts by weight of diethanolamine and parts by weight of v 3. As a new disinfectant a concentrated aqueous solution prepared from one molecular proportion of an alkali-metal salt of trichlorophenol and two molecular proportions of monoethanolamine.

RUDOLF LEHMANN. FRANZ HECKMANNS. KARL DOBMAIER. JAKOB WILLEM S. 

